Episodes
1. Cooperation As Yet Unheard OfDr. Shin Ha-ru is fired after illegally acquiring a criminal’s brain. He volunteers to help Detective Geum Myeong-se's bureau — and to make him pay.
2. The Most Brilliant MomentHa-ru and Myeong-se's first case involves a famous guitarist and his wife, who turned herself in for his murder. But Ha-ru turns the case on its head.
3. I Don't Know My Wife's FaceA Vietnamese woman is found dead with her face and hands burnt. Her husband suffers prosopagnosia; her best friend has disappeared. Both are suspects.
4. Things That Are Visible When You Close Your EyesNew evidence and test results drastically change the face of the case. A killer approaches Ha-ru, saying he wants to donate his brain to neuroscience.
5. The Girl With The Wicked SpiritA 6-year-old with aphasia gets turned in by her mother. She believes a demon has possessed her daughter to kill — and her husband has paid the price.
6. How To Be Saved ForeverHa-ru exposes the truth before the child’s exorcism can take place. And a tablet reveals some dirt on the detective, much to the doctor's delight.
7. A Man Cheating With His WifeHa-ru’s attempt to sully Myeong-se embarrassingly backfires. A man reports his wife missing to the police, claiming a "virtual human" attacked her.
8. Love, The Basic InstinctAfter a husband's confession, his wife shows symptoms of conversion disorder. Who killed who? Ha-ru gives up his revenge and leaves the department.
9. Reset ManA suspect whose memory resets every 30 minutes claims he has killed his mother. Ha-ru returns, intrigued by a patient with anterograde amnesia.
10. Though Memories Fade, feat. How to Forget Bad MemoriesThe stepbrother becomes a prime suspect as the siblings’ harrowing tale comes to light. On his date with So-jeong, Myeong-se gets a call about a body.
11. A Brain on TrialThe perpetrator who left a mysterious note at the murder scene demands a reduced sentence. Unaware of Dong-u’s plan, Ha-ru appears as a witness.
12. The Effects Love and Breakups Have on the BrainHa-ru's statement in court stirs up the media. When he unravels the cause of Kim Mo-ran’s hypersexuality, Myeong-se and So-jeong get tangled up in it.
13. A Teenage Brain Versus A Psychopath BrainA bleeding boy is found unconscious in I-na's bedroom. All of her friends claim she's the one responsible, and unfortunately, the evidence agrees.
14. The Best RevengeHa-ru helps prove I-na's innocence. As he and Myeong-se's family bond, Ha-ru finally discovers Myeong-se’s flaw, leading to his untimely resignation.
15. Episode 15Ha-ru learns that his parents weren't killed in a car accident but murdered. To find their killer, Ha-ru must accept a psychopath's dangerous offer.
16. Episode 16Myeong-se and Ha-ru must play the sympathy game, or else. The hostages will be released if their brain waves sync. Can two heads work better than one?
